推荐回答(2个)
如果是古代琴就找郑珉中先生鉴定。他是这方面真正专家,说什么年代就什么年代。
如果是新购古琴,主要是看谁做的,而不是什么木料、什么断纹。
再好的料到了水平不高的斫琴师手里,一样出不来好的音色。
木
制琴材料自古有这几种:
泡桐: 材色浅白,三五年即可成材,木质疏松,指甲轻轻一掐就能陷下去,但有经验的斫琴师会选择树龄较长的桐木,选好密度合适树段,也是制琴良材。
白桐:多部古代文献记载的制琴良材。
椅桐:早在《诗经》就有记载:“椅桐梓漆,爰伐琴桑”;为传统制琴良材。
青桐 材色浅,木质细密坚实韧性较好,树龄较长、自然风化时间百年以上者为较好制琴材料,百年以内的新青桐不宜制琴,音色透出不来。
梧桐与青桐极为相近,由于百年以上的梧桐、青桐料太难得,所以近十年来的新制古琴凡用梧桐做的大多为新梧桐或新青桐,所以音质普遍不佳。几位当今一流斫琴大师已很少用梧桐或青桐做琴。二三流的斫琴师会以此来炒作,其实他们用的绝大多数是百年之内的料。
杉木
新衫木—老衫木(老房梁)
新衫木木材发白色,随着时间的推移木材颜色越来越黄,以发金黄色的木材最老,其有很浓重的清香味。
汉木 指出土的汉代棺椁木材,其逾千年木色黝黑、松透乃斫琴良材。
现在有部分厂家用一些小尺寸的木料拼接成古琴面板进行斫制,这些古琴从外观上是很难看出来的,但只要古琴的做工、音色好琴板是否拼接也是无关紧要的。
古琴底板多用梓木、楸木、椿木、花梨等质地较硬的木材,亦有用与面板同样的木材这种琴称为“纯阳材”,具体要根据琴材的震动来合理搭配!
总之,制作一张好琴最重要的还是斫琴师的经验和技术水平,起决定因素的是槽腹结构和漆胎的处理,否则用再好的木料也做不出音色好的琴。
古琴断纹不经百年而不出是一种误解,断纹成因复杂,多与制作过程中的漆胎处理和后期保存环境有关,断纹的出现是递增的过程,不可能精确到一百年那一天突然出现,随着时间不断递增才是科学客观的说法。从历史传世实物来看民国制作的古琴也有断纹。有的传统工艺制作古琴更是在制作未完成时就已出现断纹,分析漆胎断纹鉴定文物古琴非常重要的一点。伪制断纹古已有之,方法很多,如用猛火烘烤,再以冰雪激之使其进裂;或以蛋白渗入灰中刷漆,做成后用甑蒸,然后风干;或用石膏做灰底烤制等。其实,断纹真伪经仔细观察区别还是很大的,真断纹纹形流畅,纹尾自然消失,纹峰如剑刃状;而假断纹经过冷热催化或刀刻等过程,难免有失自然,出现破绽。由于断纹成因复杂,用断纹来定古琴年代,只有真正的古琴鉴定专家才能做到。
年代久远的好琴,楼主就别想了,该收藏的早就被人收藏完了。
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